Pull-socket.



s. BucHsBAuM,

PULL SOCKET.

\ APPLICATION FILED JULY 28.1916.

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Specification of Letters lretent.

Patented Jan. t1, tt'iJlFa.

Application filed July 23, 19%. Serial No. 1.11M

To all whom it may concern.

Be it known that l, SAMUEL llncrrsniuar, a citizen of the United States;residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Pull-Sockets, oi? whichthe following is a full, clear, concise, and exact description,reference being had to the accompanying drawings, forming a. P21? ofthis specification.

My invention relates to electric switching devices and has for itsobject the provision of an improved switch mechanism which is of use ina multitude of devices such for instance as pull sockets or key sockets.

ln accordance with my invention it have a rotatable element which whenrotating in either direction of rotation is adapted to impart a quickmake anda quick break of the circuit controlled by the switch which isunder the control of said rotating clement.

ll will explain herein my invention as more specifically applied to apull socket movement andalso a key socket. 'lhese particular forms areset forth more in detail in the accompanying drawing, in which- Figure 1shows an elevation of a pull socket;

Fig. 2 shows a partial sectional view along line aa of Fig. 1;

Fig. 3 is a detail view of the ratchet mechanism employed;

Fig. i is a perspective view showing certain parts separated moreclearly to reveal features of construction; 1

Fig. 5 is a view similar to Fi 2 of the device as applied to a keysocket. and.

Fig. 6 is a fragmentary View illustrating a detail or construction.

In Fig. 1 I show the ordinary form of socket l as operated by the pullchain 2. lhe pull chain is preferably operated through a bell shapedopening 3 as more clearly shown in Fig. 2.

My improved switch mechanism includes a switch element 4 having thecontact blades 5, 5 integrally associated with a link 6. The switchelement 4 has its link projecting through an abutment 7 against whichahutment rests a spring 8 preferably encircling said link 6. The switchelement at its free extremity near the blades 5 has a flat section 9which is adapted to slide alone; the inner face of a rocker element 10.lhis rocker element is pivoted upon the studs 11 which l. The oppositelyturned lugs or cars 16, 16 are designed to he engaged by the rotatableoperating element which controls the device as will he presentlyexplained. It will be readily apparent that it the rocker element istilted from the position it occupies in Fig. so that it moves clock-.

wise until the link (3 is moved beyond the line joining the center lineof tlie spindle 11 and the center line of the hole through which said.link projects in the abutment 7 that then the spring 8 will force thisswitch element into its opposite position througha contra-clockwisemovement wherein element 4 then abuts against the ahutmcuts 14 insteadof the abutmcnts 15 'as illustrated in Fig. 2. A reverse movement of therocker 10 will of course restore the switch element 4 by snap actioninto the position of Fig. 2. In order to move the rocker from the position shown in Fig. 2 by a clockwise rotation into a position at or nearits limiting position. to thoother side, such for instance as shown inthe position of Fig. 5, l utilize a rotating element consisting in thisinstance of a. shaft 17 having at its right hand extremity an augularlydisplaced. section 18. The element 17, 18 is made of a piece of materialrounded in cross-section, thus to facilitate its manufacture, saidelement being merely bent into the form shown. The diagonal section 18is partly rounded at its extremities to provide a more gradual movementas will presently appear. The'rotatalole element 1?, when occupying theposition of Fig. 2, holds the rocker 10 in the position shown. It now,thisdiagonal section 18 is moved about into its alternative position asshown. in Fig". 5, then it of course carries the rocker I with it and assoon as the movement has been suliicient to permit the sprinp 8 to passthe dead center, this spring 'l'orces the parts into the position of Fig.3 by snap action. It oi course makes no difierence what might be thedirection of rotation of the rotatable element 17 as the movement fromone limiting position by either direction of rotation Will carry thediagonal strip 18 into its alternative position.

1n the construction of Fig. 5 this is taken advantage of by supplyingthe rotatable element 17 with akey 19, thus to form a key socket.

In Fig. 2 the same result is accomplished when the chain 2 issuccessively pulled, this chain acting upon a rotatable sleeve 20loosely carried about the rotatable element 17. The rotatable element inthis instance has a pin 21 passing therethrough. "lhe sleeve 20 islikewise provided with two spring catches 22 and 23 held down inposition at their extremities, as at 25, to engage the stud 21. A spring26 forces the sleeve 20 to the right (Fig. 2) and at the same time tendsto rotate this sleeve in a clock- WlSG direction, referring to Fig. 3,or what might be a contra-clockwise directlon if the device of Fig. 2were looked at in the direction of the arrow Z). A suitable stop 27limits this reverse or retractile movement of the sleeve 20.

It will thus be seen that l have provided a switch structure by which aquick make and a quick'break may be obtained by controlling the switchelement in a. suitable manner from a rotatable element. The arrangementis such moreover that the parts for the key socket and pull socket areprac tic-ally interchangeable by merely substituting the controlmechanism of one for the control mechanism of the other, the actualswitch structure and its parts remaining the same.

It is thought that the true nature of my invention will thus be readilyapparent to those skilled in the art.

Having however thus described one form which my invention may take, whatI claim as new and desire tosecure by Letters Patent is:

A 1. A switch movement of the character 'described comprising a switchelement, and

means for moving said switch element by snap action from either limitingposition to gral with said switch element inclosed by the convolutionsof said spring.

2. A switch movement of the character described comprising a switchelement, and means for moving said switch element by snap action fromeither limiting position to the other, said means including anoscillatingly mounted rocker, a rotatable control element cooperatingwith said rocker to move said rocker alternately from one limitingposition toward its other limiting posi' tion, said switch element being.slidable along said rocker, a spring for engaging said switch elementand adapted to force it into either limiting position at the oppositeextremities of said rocker, a stem integral with said switch elementinclosed by the eonvolutions of said spring, and an abutment for thefree extremity of said spring slidably supporting said stem.

In witness whereof, I hereunto subscribe my name this 25thday of May, A.D. 1916.

SAMUEL BUOHSBAUM.

